nutshells

Now I don't know whether it was because they had overeaten, or they were just in high spirits, but--to make a long story short--they did not want to go back home on foot, so the rooster had to make a little carriage out of nutshells.

不知道它们究竟是因为吃多了撑着呢，还是因为它们突然变得心高气傲起来，它们竟然不愿意步行回家。公鸡用核桃壳做了一辆小车。

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if this is true, premolars will contain internal cracks that could only come from shattering large foods such as nutshells.

如果这是真的，那么，前磨牙将包含只能由咬碎像坚果外壳一样的大块食物造成的内部裂痕。

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